Metal tip for guide-cards.



D. E. HUNTER. METAL TIP FOR. GUIDE GARDSL I APPLICATION FILED 00114, 1907.

I-Ii/ 1921/91/15 Patented. Dec. 1, 1908.

\X/ITHEIE. E: E15;

' 6 /2444 J. man M citizen of the United States,

DAVID E r parian, oFcAMBRinGE, MASSACHUSETTS;assio'non ToLiB A YBUREiuf or i "Bos'roN'; MASSACHUSETTS, A coarona'rioivor NEWJERSEY. 7

I ,waee easement. a

Specification of Letters Patent.

v Patented Dec. 1, 1908.

Application filed October 14, 1907. Seria1Iio.397, 2 67.

To all whom it may concern:

Be it known that I, DAVID E. HUNTER, a and resident of Cambridge, in the county of Middlesex and State of Massachusetts, have invented new.

and useful Improvements in Metal Tips for Guide-Cards, of which thefollowing is a I specification. k My invention consists 1n improvements in metal tips for guidecards in card/systems and is illustrated in the drawings hereto annexed, which show an embodiment of my invention, whereof Fi'gure 1 is a perspectiveview of a guide card with its tip attached; Fi 2 is a sectional view on an enlarged scale of a guide a card; and Fig. 3 is a similar section taken on the line 3g, Fig.1, showing the tip attached to the car Heretofore metal tips have sometimes been applied to guide cards by means of I separate eyelets inserted through registering apertures in the card and the leaves of the tip and clenched over the outside surfaces of the tip. The presence of the flanges of these clenched eyelets, raised as they are above the surfaces of the sheet metal tip, has proved to be detrimental for the reason {that the projecting parts are an. obstacle to the insertion or removal of cards placed adjacent to the guide card and that they add unprofitably to the thickness of the mass of cards as measured from front to back in the receptacle which contains them. Moreover, the manufacturer of card systems is obli ed to handle several separate pieces in attaching the metal tips to-the cards.

1 By my improvements illustrated herein I provide guide cards with metal tips which present a smooth unbroken surface both on front and back, are of minimum thickness and require no atta'chim means except those which are provided in the integral structure of the tips themselves.

The metal tip as shown in Fig. 2 is a sheet folded at a so as'to form opposed leaves. A A which are perforated to form the. square openings B through which the index slip is .of the surface of the leaf A.

visible. Apertures F are made in the two leaves A A with each other and also with apertures in the cards C. One'of the two leaves, as A, has the integral flange E formed around the aperture F and is also by preference so shaped that a marginal depression or dished portion D "appears around the edge of the aperture and the flange E. The opposed leaf A has its aperture the edge thereof at E outside diameter of the flange E and the material around the margin E is depressed or dished as at D.

so that they oppose and register so proportioned that corresponds to the,

n Fig. '3 my improved sheet metal card tip is shown on an enlarged scale as contrasted with Fig. 1 in section upon the line 3+3, Fig. l. 'The flange E is inserted through the proper aperture in the card C and'through the registering aperture in the leaf A and is then clenched over the mar gin E in such a manner that the clenched portion of the flange E lies inside the plane One or preferably two or more flanges and corresponding dished openings are employed'in preparing and securing my improved metal tip,

which by reason of the construction above described is of practically minimum thick-' ness when attached to the card and presents a perfectly smooth appearance on both sides, unobstructed by any excrescence or projection.

When the tip is secured to the card, the

depressed or dished margin E enters the apertlgrein the card and meets theopposed inner surface of the opposite metal leaf at a plane between the planes of the two surfaces of, the c ard. Thus the fastening members lie wholl planes'o the space surfaces.

What I claim and desire ters Patent is-:-

A tip for guide cards and the like, consisting of a metal sheet folded to form opposite leaves, one of said leaves being apertured near the fold to disclose an index tab,

, within the space bounded by the the tip itself, and largely within bounded by the planes of the card to secure by Letone of said 'lea ves containing a circular Signed by me at Boston, Massachusetts, opening inivvardly dished at the margin, a this twelfth day of October 1907. corresponding integral tubular clenching DAVID E HUNTER flange, formed in the other leaf, adapted to be turned over the inwardly dished margin Witnesses:

of said aperture, and when so turned lying CHARLES D. l/Voomsnnm, inside the surface planes of the leaf. JOSEPHINE H. RYAN. 

